Product Description
High Alumina Ceramic Grinding Ball 92-95% Al2O3 Porcelain Balls for Polishing
Alumina grinding ceramic balls Description
92% Alumina ceramic balls use bauxite, roller powder, industrial alumina powder, high-temperature calcined alumina powder and other materials as raw materials, through batching, grinding, powdering (pulping, mud making), molding, drying, firing, etc. Possessed with high density, high hardness, low wear, good seismic stability and good corrosion resistance, the products are the most ideal medium for grinding glaze, blank and mineral powder processing, and are used as the grinding medium of ball mill in ceramics, cement, paint, refractory, inorganic mineral powder and other industries.
99% High Alumina Ceramic Ball is made from alumina powder of low silicon content. The high purity and high strength make them extremely high temperature resistance, is used to avoid the leaching reaction tower of silica cover downstream equipment or dirt or poisoned catalyst carrier. This makes them all ideal choice for support of all types of catalyst. It's widely used in petroleum, chemical, fertilizer, gas and environmental protection industries, as a catalyst in the reactor to cover support material and tower packing. It has a high temperature and high pressure resistance, bibulous rate is low, the characteristics of the chemical performance is stable. Can withstand the erosion of acid, alkali and other organic solvents, and can endure in the production process of temperature changes. Its main function is to increase gas or liquid distribution points, support and protection intensity is not high activity of the catalyst.
Technical Data
Chemical Composition:
| Al2O3 |
Fe2O3 |
MgO |
SiO2 |
Na2O |
TiO2 |
| >99% |
<0.1% |
<0.5% |
<0.2% |
<0.05% |
<0.05% |
Leach able Fe2O3 is less than 0.1%.
Technical Specification of Grinding Ball
| Product |
Al2O3 % |
Bulk density g/cm2 |
Water absorption |
Mohs hardness scale |
Abrasion loss % |
Color |
| High alumina grinding balls |
92 |
3.65 |
0.01 |
9 |
0.011 |
White |
| Medium alumina grinding balls |
65-70 |
2.93 |
0.01 |
8 |
0.01 |
Yellow-White |
| Appearance demand |
| |
High alumina grinding balls |
Medium alumina grinding balls |
| Crack |
Not permission |
Not permission |
| Impurity |
Not permission |
Not permission |
| Foam hole |
Above 1mm not permission, size in 0.5mm permit 3 balls. |
| Flaw |
Max. size in 0.3mm permit 3 balls. |
| Advantage |
a) High alumina content |
| b) High density |
| c) High hardness |
| d) High wearing feature |
| Warranty |
a) By national standard HG/T 3683.1-2000 |
| b) Offer lifetime consultation on problems occurred |
Typical chemical compositions:
| Items |
Proportion |
Items |
Proportion |
| Al2O3 |
≥92% |
SiO2 |
3.81% |
| Fe2O3 |
0.06% |
MgO |
0.80% |
| CaO |
1.09% |
TiO2 |
0.02% |
| K2O |
0.08% |
Na2O |
0.56% |
| Spec.(mm) |
Volume(cm3) |
Weight(g/pc) |
| Φ30 |
14 ± 1.5 |
43 ± 2 |
| Φ40 |
25 ± 1.5 |
126 ± 2 |
| Φ50 |
39 ± 2 |
242 ± 2 |
| Φ60 |
58 ± 2 |
407 ± 2 |
Physical Properties:
| Item |
Value |
| Water absorption (%) |
<1 |
| Bulk density (g/cm3) |
1.9-2.2 |
| Specific gravity (g/cm3) |
>3.6 |
| Operation temp.(max) (ºC) |
1650 |
| Apparent porosity (%) |
<1 |
| Moh's hardness (scale) |
>9 |
| Acid resistance (%) |
>99.6 |
| Alkali resistance (%) |
>85 |
Crush Strength:
| Size |
Crush strength |
| Kg/particle |
KN/particle |
| 1/8" (3mm) |
>203 |
>2 |
| 1/4" (6mm) |
>459 |
>4.6 |
| 1/2" (13mm) |
>877 |
>8.7 |
| 3/4" (19mm) |
>1220 |
>12 |
| 1" (25mm) |
>1630 |
>16 |
| 1-1/2" (38mm) |
>2340 |
>23 |
| 2" (50mm) |
>3460 |
>34 |
Other size can be customize.
Size and Tolerance:
| Size and tolerance (mm) |
| Size(mm) |
3/6/9 |
9/13 |
19/25/38 |
50 |
| Tolerance |
± 1.0 |
± 1.5 |
± 2 |
± 2.5 |
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